Sieve.



J. W. FORD, JR.

SIEVE.

APPLICATION FILED NOV. 20, 1912.

@Pzitented'Aug. 5, 1913.

2 SHEETSSHEET 1.

o 0 6 3 w W W J. W. FORD, JR.

SIEVE.

APPLICATION FILED NOV. 20, 1912.

Patented Aug. 5, 1913.

2 SHEETS-SHEET 2.

mit the same tobe locked in any'desired position, I provide a notched locking bar 3-1, which is secured at its lower end to said gate and which extends u jiwardly along the outer face of the rear hopper wall. A U-shaped fastening encircles the locking bar 84: and

f may be engaged by any one of the notches formed therein.

To provide for a proper moven'ient of the chute 2b in order that a stead feed of material may be insure I provide the lift yoke 36 which is pivotally connected at its ends to--the pivot rod 29. and which extends rearwardl v and upwardly and ac thcrearhopper-wall. Links 25? are pivotally connected to the inner ends of the yoke arms and to the chute E36. ltollers 3H are nmunted upon the angle iron ribs. 22 of the sieve and as the sieve revolves, strike against the inclined wall of the spur 39, carried upon the yoke -36. The spur ijtthas an inclined wall 4ft) which is engaged by the rollers and terminates abruptly with a vertical end wall J1, and thus the yoke 36 is gradually lifted and allowed to drop with a jarring action. The movement of the yoke is transmitted to toe pivoted chute 2a through the medium of the links 37 and a steady flow material is insured. The jar sustained by the sieve as the rollers 38 strike the spur 3!), tends to dislodge all material from the meshes of thescrcen 1n the operation of my improved sieve, material to-be screened is placed in the hopper 25 and flows down over the inclined chute 26, into the forward end of the rearwardlv inclined sieve. By turning the crank it), the shafts 1S and 16, are revolved and carry with them the rotary sieve. The finer particlesof tl io'material drop through the wire mesh '33, while the coarser particles are expelled through the rear of the sieve onto thetrough 4-2, Each time one, of the angle iron ribsjlfl passes under the spur 39, the roller carried upon said rib, raises the yoke so, causing the chute 26 to move upwardly. then the roller moves beyond the spur the chute drops quickly because of the weight of the material carried thereon. The flow of the material through the chute .36 may be l l j l l regulated, as heretofore described, by adjusting the gate 32.

While I -havefi'shown and described the preferred embodiment of my invention, it is to be understood that I do not wish to be limited to this exact construction and ar:

rangement of parts, but may make such changes as will fall within the scope and spirit of the invention.

Having thus described my invention, What I claim is l. A machine of the character described, including a supporting frame, a sieve rotatably supported thereby, a hopper, a chute pivotally secured under said hopper and emptying into the sieve, a lift yoke pivoted at its ends and extending over the sieve,

links connecting the yoke to the chute, and means carried upon the sieve adjacent one end thereof for engagement with the yoke, whereby the chute is agitated and the sieve vibrated to cause the contents of the sieve to be precipitated through the meshes thereof.

a. i machine of the character described, including a supporting frame,a sieve rotatably supported thereby, a hopper, a chute pivoted to said hopper and discharging into the sieve, a yoke pivoted to said hopper and projecting above the sieve, links connecting said yoke to the chute, the yoke being formed with a tapered projection, and means carried by the sieve adjacent one end thereof for engagement with said projection, whereby the chute is agitated and the sieve vibrated to cause the contents of the sieve to be precipitated through the meshes thereof.

3. A machineof the character described, including a supporting frame, a sieve rotatably supported thereby, a hopper, a chute pivoted to said hopper and discharging into the sieve, a yoke pivoted to said hopper and projecting above the sieve, links connecting saidyoke to the chute, the yoke being formed with a tapered projection, and rollers carried upon the periphery of said sieve for engagement with the tapered projection, whereby the yoke is lifted to agitate the chute and the sieve vibrated to cause the contents of the sieve to .be precipitated through the meshes thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN l/V. FOltllJn.

' Witnesses:

Cannes A. S'rnnmns, J12,

M, Tit-roar. 

